Onan CCK Series Operator's Manual And Parts Catalog

CARBURETOR, GASOLINE
The carburetor has an adjustable idling jet and an
adjustable main jet. If the engine runs unevenly at
half or full load due to faulty carburetion, the main
adjusting needle requires adjustment. The idle ad¬
justment needle normally requires little attention
other than a periodic cleaning. A hunting condition
(alternate increase and decrease in engine speed) at
no load can sometimes be adjusted by an idle jet
adjustment. Make all adjustments with the engine
at normal operating temperature.
To adjust the main jet, connect a full or nearly full
load to the engitte. Turn the main adjusting needle
out about two full turns. Then turn it in slowly until
the engine begins to lose power and speed. Then
turn it out slowly until the engine tuns smoothly at
full power and speed. If the engine develops a hunting
condition try correcting by opening the main adjusting
needle a little more. Do not open more than 1/2 turn
beyond the maximum point of power. If this does not
correct the condition, adjust the sensitivity of the
governor.
Make the idle jet adjustment with no load connected
to the engine. Turn the needle in until the engine
loses considerable speed. Then turn it out until the
engine runs smoothly.
SISSON CHOKE
This choke should not require any seasonal readjust¬
ment. If adjustment becomes necessary, pull choke
lever up and insert a 1/16" diameter rod through
shaft hole (opposite end from lever) and engage rod
in notch of mounting flange, to lock shaft in place.
Loosen the choke lever clamp screw. With air inlet
removed, adjust choke lever so carburetor choke plate
is completely closed, or not more than 5/16" open.
Tighten choke lever clamp screw and remove locking
rod from shaft.
THERMO-MAGNETIC CHOKE (OPTIONAL)
This choke uses a strip heating element and a heat
sensitive bimetal spring to control the choke plate
position. In addition to this, a solenoid is actuated
during engine cranking, closing the choke all or part
way, depending on ambient temperature. The bimetal
is factory set to position the choke to the proper
opening under any ambient condition. ^
If adjustment of the bimetal is needed, it must be
made at ambient temperature. Do not attempt adjust¬
ments until the engine has been shut down for at least
one hour. Loosen the screw which secures the choke
body assembly (see Figure 10). Rotating the choke
body clockwise tichens and counterclockwise leans
the choking effect. For ambient temperatures below
60‘^F the choke should be opened 1/8" with the sole¬
noid not engaged. Tighten the screw that secures
the choke body.

Onan CCK Series Specifications

General

Fuel Type	Gasoline
Fuel System	Carburetor
Frequency	60 Hz
RPM	1800 RPM
Starting System	Electric or Recoil
Starting Method	Electric or Recoil Start
Voltage	120/240V
Compression Ratio	6.5:1
Ignition System	Battery Ignition
Phase	Single-phase